A-A+
口算 13×40=560÷40=3÷100=0.28×100÷10=3-1.4=3.7+1.
问题详情
口算
参考答案
13×40=520,560÷40=14,3÷100=0.03,0.28×100÷10=2.8,3-1.4=1.6,3.7+1.13=4.83,120×6=720,125×7×8=7000,45×20=900,2.5+0.9=3.4,0÷78=0,10-2.3-2.7=5,84÷4=21,101×28=2828,1000×0.013=13,25×12+25×28=1000,
考点:口算